A new family of electromagnetic interference, low-pass RC Pi filter arrays from OnChip comes with onboard diodes for electrostatic discharge (ESD) protection. These devices are crafted specifically for high-speed data LCD and memory card interfaces in mobile phones, PDAs, and MP3 players. The OC1425 is a 4-channel EMI filter while the EMF4020 and the OC1442 are 8-channel EMI filter arrays. All three devices are designed to reject rerouted and retransmitted radiation frequencies on the lines between the graphics controller and the LCD. Designed with line capacitances that support up to 30-MHz frequencies and minimize impact on the rise and fall times of video signals, these devices are capable of attenuating unwanted signals over the RF band between 800 MHz and 3 GHz. Additionally, they have built-in Zener diodes that protect the LCD controller and the I/O ports against damage from ESD of up to 15 kV rated to meet IEC61000-4-2 standard level 4 ESD requirements. These filters are offered in a flip-chip package, reducing board space and also minimizing the package parasitics thereby delivering excellent S21 characteristics with extremely low parasitic inductance (10 pH). They have a very low profile of 0.65 mm or less than 0.03 inches. Learn more at the OnChip website.The design of mobile handsets is just one of the challenges facing today’s designers. The NEBS/Telecom Forum on InterferenceTechnology.com fields questions and comments on every aspect of the rapidly changing telecom industry. Are you looking for testing services, the right component, or applicable standard? For an answer from one of our many knowledgeable readers, just post your query to the NEBS/Telecom Forum.
Miniature EMI Filter Arrays with ESD Diodes Target Mobile Handsets
